CFD Modeling of Melt Spreading Behavior on Spinning Discs and Cups for Centrifugal Granulation of Molten Slag

Pan, Yuhua; Zhao, Ming; Ma, Ping; Li, Jing; Huo, Zhaoyi; Li, Hongyu

doi:10.1007/s40831-019-00213-1

Cited by 12 publications

(4 citation statements)

References 8 publications

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“…The effect of the shape parameters on extruded velocity and pressure in melt-spinning was investigated via CFD modeling. 15 The lowest extruded velocity was observed when the nozzle degree was 90°(Figure S2), indicating that the winding speed was easier to control precisely. Thus, the fiber diameter can be optimized conveniently at a nozzle degree of 90°.…”

Section: Melt-spinning Parametermentioning

confidence: 99%

“…Thus, the students thought that the shape parameters of the nozzle, including degree (Figures S2) and length/diameter ratio (Figure S3), were important for the flow state of the melted pitch. The effect of the shape parameters on extruded velocity and pressure in melt-spinning was investigated via CFD modeling . The lowest extruded velocity was observed when the nozzle degree was 90° (Figure S2), indicating that the winding speed was easier to control precisely.…”

Section: Experimental Designmentioning

confidence: 99%

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Design and Implementation of a Chemical Engineering Experiment That Combines Online Teaching with Laboratory Practice for Undergraduates Affected by COVID-19

Liu,

Liu

2023

J. Chem. Educ.

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The COVID-19 epidemic adversely impacted chemical engineering experiments (CEEs). Students underwent online learning, i.e., software simulation of the CEE course, instead of laboratory learning. A questionnaire survey revealed that students exhibited low enthusiasm for online learning, showing that online courses cannot ensure learning quality. Thus, herein, a novel CEE was designed based on the melt-spinning principle of the pitch-based carbon fiber preparation process. The feasibility of the experiment was demonstrated by inviting 12 teams of 60 students to participate in the trial experiment. The results indicate that the designed experiment improved the students’ ability to conduct literature reviews, computer simulations, apparatus designs, and experiments. The novel experiment was well received by the students. Although the students encountered difficulties in the experimentation process, they were highly interested in participating in this novel experiment and, thus, were successful in solving all of the problems with the supervisor’s help. The experiment helped to improve the comprehension abilities of the students.

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Section: Melt-spinning Parametermentioning

confidence: 99%

Section: Experimental Designmentioning

confidence: 99%

Design and Implementation of a Chemical Engineering Experiment That Combines Online Teaching with Laboratory Practice for Undergraduates Affected by COVID-19

Liu,

Liu

2023

J. Chem. Educ.

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“…The fourth and last paper of this thematic section is by Pan et al [4] and covers CFD modeling of melt spreading behavior on spinning disks and cups. In this work, a CFD model has been used to study the effects of slag flow rate, spinning rate, depth of the cup, and angle of the side wall on the thickness of slag film and hence droplet size.…”

Section: Alternative Approachesmentioning

confidence: 99%

Preface for Thematic Section: Slag Granulation

Jahanshahi

2019

J. Sustain. Metall.

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“…Using the VOF multiphase flow model, Wang et al [18] numerically simulated the flow of a continuous free surface film on a spinning disc and determined the slag film thickness distribution in the direction of the disc radius. Pan et al [19,20] performed numerical simulations using an established CFD model to explore the effect of various parameters on the liquid film thickness at the edge of the disc. By conducting a regression analysis to correlate the experimentally measured mean slag particle diameter reported by Liu et al [21] with the slag film thickness predicted through CFD model simulations, Zhang et al [22] found that the mean diameter of slag particles is approximately four times the slag film thickness at the cup's edge.…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Numerical Simulation on Flow Behavior of Molten Slag–Metal Mixture over a Spinning Cup

Wang,

Pan,

Zhao

et al. 2024

Processes

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Centrifugal granulation technology using a spinning cup opens a potential way to recycle steel slag that is currently difficult to reuse. The objective of this research was to study the flow characteristics of a molten slag–metal mixture that was produced during smelting reduction in molten steel slag, passing over a spinning cup, so as to explore the feasibility of using centrifugal granulation technology to treat the steel slag. This was achieved by developing and implementing a computational fluid dynamics (CFD) model that incorporated free-surface multiphase flow to predict the thickness of the liquid slag film at the edge of the spinning cup (slag film thickness for short), which was an important parameter for estimating the size of the slag particles resulting from centrifugal granulation of the molten slag–metal mixture. The influences of various relevant parameters, including spinning cup diameter, slag feeding rate, cup spinning speed, etc., on the slag film thickness were analyzed. Additionally, hot experiments on centrifugal granulation of a molten slag–metal mixture were conducted to verify the results of the numerical simulations. The experimental results indicated a progressive reduction in the Sauter mean diameter of the slag particles as the metallic iron content in the slag increased. Specifically, when the iron content rose from 5% to 15% at a cup spinning speed of 2500 RPM, the Sauter mean diameter decreased by 13.77%. The numerical simulation results showed that the slag film thickness had a positive relationship to the slag feeding rate but a negative relationship to the spinning cup diameter and the cup spinning speed. Furthermore, the ratio between the mean slag particle diameter and the slag film thickness decreased nearly linearly with the increase in the metallic iron content in slag, with the average ratio being approximately 4.25, and this relationship was useful for estimating the slag particle size from the slag film thickness. Therefore, the present research results can provide theoretical guidance for the industrial application of spinning cup centrifugal granulation technology to effectively treat and recycle steel slags.

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CFD Modeling of Melt Spreading Behavior on Spinning Discs and Cups for Centrifugal Granulation of Molten Slag

Cited by 12 publications

References 8 publications

Design and Implementation of a Chemical Engineering Experiment That Combines Online Teaching with Laboratory Practice for Undergraduates Affected by COVID-19

Design and Implementation of a Chemical Engineering Experiment That Combines Online Teaching with Laboratory Practice for Undergraduates Affected by COVID-19

Preface for Thematic Section: Slag Granulation

Computational Fluid Dynamics Numerical Simulation on Flow Behavior of Molten Slag–Metal Mixture over a Spinning Cup

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